CaO-Al_(2)O_(3)-V_(2)O_(5)渣系1600℃相平衡关系研究  

Phase coexistence relationship of CaO-Al_(2)O_(3)-V_(2)O_(5)slag system

作　　者：郝冠迪 邱吉雨 龚恒辉 刘源[1,2] 姜茂发 Hao Guandi;Qiu Jiyu;Gong Henghui;Liu Yuan;Jiang Maofa(Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education),Northeastern University,Shenyang 110819,Liaoning,China;Northeastern University School of Metallurgy,Shenyang 110004,Liaoning,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2024年第5期147-150,共4页Iron Steel Vanadium Titanium

基　　金：东北大学大学生创新创业训练计划项目(S202210145205);国家自然科学基金(52104327);中央高校基本科研业务费项目(N2224001);博士后基金面上项目(2020M680966)。

摘　　要：CaO-Al_(2)O_(3)-V_(2)O_(5)渣系是钢液脱氮渣系的基础氧化物渣系,其相平衡关系等热力学信息对于相关渣系的研究和开发至关重要。通过高温相平衡试验,结合扫描电镜和能谱分析,研究了CaO-Al_(2)O_(3)-V_(2)O_(5)渣系的相平衡关系。根据试验结果,确定了CaO-Al_(2)O_(3)-V_(2)O_(5)渣系1600℃空气气氛条件下的相平衡关系,并绘制该体系全成分范围内CaO-Al_(2)O_(3)-V_(2)O_(5)渣系的等温截面图,共包含7个平衡相区,分别是:Liquid+Al_(2)O_(3)+CaAl_(12)O_(19)、Liquid+CaAl_(12)O_(19)+CaAl_(4)O_(7)、Liquid+CaO、Liquid+Al_(2)O_(3)、Liquid+CaAl_(12)O_(19)、Liquid+CaAl_(4)O_(7)和单一液相区。上述平衡相区的确定可实现CaO-Al_(2)O_(3)-V_(2)O_(5)渣系相图独立子体系的划分,还可为该渣系后续高温相图的绘制提供支持。CaO-Al_(2)O_(3)-V_(2)O_(5)slag system is a basic metallurgical slag system for denitrification of liquid steel.The lack of thermodynamic information,such as the phase equilibrium relationship,limits the research and development of related slag systems.In this paper,the phase equilibrium relationship of CaOAl_(2)O_(3)-V_(2)O_(5)slag system was studied through high temperature phase equilibrium experiment,combined with scanning electron microscope and energy spectrum analysis.According to the experimental results,the phase equilibrium relationship of CaO-Al_(2)O_(3)-V_(2)O_(5)slag line at 1600℃in air atmosphere was determined,and the isothermal cross section of CaO-Al_(2)O_(3)-V_(2)O_(5)slag line within the whole component range of the system is drawn,including 7 equilibrium phase regions,i.e.,Liquid+Al_(2)O_(3)+CaAl_(12)O_(19),Liquid+CaAl_(12)O_(19)+CaAl_(4)O_(7),Liquid+CaO,Liquid+Al_(2)O_(3),Liquid+CaAl_(12)O_(19),Liquid+CaAl_(4)O_(7)and single liquid phase region.The determination of equilibrium phase regions between the above phases can realize the division of independent sub-systems of the phase diagram of the CaO-Al_(2)O_(3)-Ce2O3 slag system,and can also provide support for the subsequent high-temperature phase diagram drawing of the slag system.

关 键 词：炼钢 CaO-Al_(2)O_(3)-V_(2)O_(5)渣系 物相 高温相平衡试验 

分 类 号：TF703.6[冶金工程—钢铁冶金]